Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2fff332df04105…

MALICIOUS

PDF

50.5 KB Created: 2020-08-09 16:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7b3e19c7741501c34b66151af7995be8 SHA-1: de90d7a307beadebd51929c3557a9e8486415ee3 SHA-256: 5a2fff332df041056a14f606911fdaea33b432e2d923b34891f9072a3bf7e68a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, includes the URL and a deceptive title suggesting a lure for SEO spam or phishing. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=acordes+de+canciones+cristianas+faciles+para+guitarra+pdf In PDF document text
    • http://guwenitus.samuelclemens1856.com/uploads/1/3/0/9/130969723/04b37.pdfIn PDF document text
    • http://files.realestateculture.com/uploads/1/3/1/0/131070434/9394084.pdfIn PDF document text
    • http://files.wetsunweekend.com/uploads/1/3/0/7/130776131/5697055.pdfIn PDF document text
    • http://files.redcoatmodels.com/uploads/1/3/0/7/130740138/gokorazogozugos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/xedapefaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/ponuzejikelamij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/33674876022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/kuwukewerurododazexomunut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/30634725789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/revopogiwabulimubotafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/gowarolujozor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/gojegelojozal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8022/4663/files/advanced_excel_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/65618947049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/roxalezuzagodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/walter_scott_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/tobosizipepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/femizon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC 5312 bytes
SHA-256: a4a5f0ec432a3bbef0fc931153327ff46c2e176442e5221f0c081c3162a3afd2
font_01_sfnt_off00008dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCF 14684 bytes
SHA-256: d8731ee491b0b965b51e0fb517e2461d7ad6046e6d41f5f8a19017b12a8ed960

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